ARM: OMAP: Make plat/omap_hwmod.h local to mach-omap2

Let's make omap_hwmod local to mach-omap2 for
ARM common zImage support.

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/pmu.c b/arch/arm/mach-omap2/pmu.c
index 4b3230f..98c5969 100644
--- a/arch/arm/mach-omap2/pmu.c
+++ b/arch/arm/mach-omap2/pmu.c
@@ -15,7 +15,7 @@
 
 #include <asm/pmu.h>
 
-#include <plat/omap_hwmod.h>
+#include "omap_hwmod.h"
 #include "omap_device.h"
 
 static char *omap2_pmu_oh_names[] = {"mpu"};